In perhaps the harshest jeer from Golden Globes bleachers, the man who grew up calling Woody Allen "dad" decided to bash the film auteur as he was being honored with a Cecil B. DeMille Award at the 71st annual awards show on Sunday evening.

We repeat, Allen's own would-be son, Ronan Farrow, started a smear campaign as the director's long and distinguished career was revered in front of the world during the live televised event. (We say "would-be son" because his mother Mia Farrow told Vanity Fair last year that Ronan is "possibly" Frank Sinatra's son, and not Allen's.)

His stinging tweet quickly went viral, receiving more than 8,500 retweets and over 6,000 favorites so far.

He also shared a link a link to the Vanity Fair story, in which his sister Dylan spoke publicly for the first time about allegedly being molested by Allen in the attic of their country home when she was 7. Allen has always denied the allegations and did so again through a lawyer in the article.

Ronan then retweeted twoposts from people lauding him for supporting sexual abuse survivors.

Maybe it's a good thing Allen wasn't at the show. Diane Keaton accepted the award on his behalf as the director has a well-established track record for ditching such events — even when he's nominated. (For the record, the "Blue Jasmine" director spent Sunday night taking in Broadway's "Beautiful: The Carole King Musical," according to Katie Couric, who was also at the show.)

Mia Farrow, Allen's longtime former partner, and also longtime detractor — since he took up with their adopted daughter Soon Yi, marrying her in 1997 — joined in the Twitter hatred, writing as the Allen tribute began:

Ronan Farrow, 26 years old and now a host on MSNBC, is also a lawyer and former U.S. Global Youth Issues envoy.

And this isn't the first time he lobbed a cutting comment in the direction of his famous father. On Father's Day 2012, he tweeted, "Happy father’s day — or as they call it in my family, happy brother-in-law's day."